“ CSV 更换引号样式（双引号 / 单引号）Change CSV Quote Style
把 CSV 字段的引号在双引号和单引号之间转换：有些数据库导出用单引号，本工具可改成标准双引号 CSV，或反过来。内部引号会正确转义。Convert CSV field quotes between double and single quotes. Some database exports use single quotes; this tool turns them into standard double-quoted CSV, or the other way round. Inner quotes are escaped correctly.
使用说明与常见问题How-to & FAQ
「CSV 更换引号样式（双引号 / 单引号）」是什么？What is the Change CSV Quote Style tool?
把 CSV 字段的引号在双引号和单引号之间转换：有些数据库导出用单引号，本工具可改成标准双引号 CSV，或反过来。内部引号会正确转义。Convert CSV field quotes between double and single quotes. Some database exports use single quotes; this tool turns them into standard double-quoted CSV, or the other way round. Inner quotes are escaped correctly.
如何使用「CSV 更换引号样式（双引号 / 单引号）」？How do I use the Change CSV Quote Style tool?
在「CSV 更换引号样式（双引号 / 单引号）」中，把内容粘贴或输入到上方输入框，按需设置「输入引号」、「输出引号」、「方式」，结果会实时显示在下方，点击「复制结果」即可复制。Paste your CSV, set "Input quotes" to the quote character the file uses, then choose "Output quotes" and the Mode. The converted CSV appears below as you type; click "Copy result" to copy it.
什么时候需要换引号？When do I need to change quotes?
MySQL 等导出有时用单引号；Excel 和大多数程序要双引号。先选对“输入引号”，再选“输出引号”。MySQL and similar exports sometimes use single quotes; Excel and most programs expect double quotes. Set Input quotes to match the file, then choose Output quotes.
单引号 CSV 是标准吗？Is single-quoted CSV standard?
不是。RFC 4180 规定用双引号。本工具支持单引号只是为了兼容非标准导出。No. RFC 4180 specifies double quotes. Single quotes are supported here only for non-standard exports.
输入和输出是什么样的？What does the input and output look like?
例如在「CSV 更换引号样式（双引号 / 单引号）」中输入 a,b ⏎ 1,2，「输出引号」设为 输出单引号 '，「方式」设为 全部字段加引号，输出为：'a','b' ⏎ '1','2'（⏎ 表示换行）。With "Output quotes" set to Output ' and "Mode" set to Quote every field, the input a,b ⏎ 1,2 becomes 'a','b' ⏎ '1','2' (⏎ marks a line break).
有哪些选项可以调整？What options can I adjust?
「CSV 更换引号样式（双引号 / 单引号）」的设置：「输入引号」可选 输入用双引号 "、输入用单引号 '（默认 输入用双引号 "）；「输出引号」可选 输出双引号 "、输出单引号 '（默认 输出双引号 "）；「方式」可选 仅必要时加引号、全部字段加引号（默认 仅必要时加引号）。改动任一选项后结果会按新设置重新生成。You can adjust "Input quotes" — Input uses " / Input uses ' (default: Input uses "); "Output quotes" — Output " / Output ' (default: Output "); and "Mode" — Quote only when needed / Quote every field (default: Quote only when needed). The result updates as soon as you change a setting.
行长度不一致（有的行字段多、有的行字段少）时会怎样？What happens when rows have different numbers of fields?
不会凭空补字段，也不会删掉字段：操作只作用于每行实际存在的字段，每行保持自己原来的长度。比如某行没有要处理的那一列，这一行就原样保留。检测到这种行时，结果下方会有一行提示说明有几行。需要统一列数时，请用“CSV 补齐不完整行”。No fields are invented or dropped: the operation only touches the fields each row actually has, and every row keeps its own length. If a row does not have the column being changed, that row is left as it is. When such rows are found, a one-line note below the result says how many. To give every row the same number of fields, use Fill Incomplete CSV Records.
代码或数据会被上传吗？Is my code or data uploaded?
不会。「CSV 更换引号样式（双引号 / 单引号）」完全用 JavaScript 在本地运行，适合处理含有密钥、内部接口等敏感内容的数据。No. The Change CSV Quote Style tool runs entirely in local JavaScript, so it is safe for data containing keys or internal endpoints.
「CSV 更换引号样式（双引号 / 单引号）」免费吗？需要注册吗？Is the Change CSV Quote Style tool free? Do I need an account?
「CSV 更换引号样式（双引号 / 单引号）」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The Change CSV Quote Style tool is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.